Mettler-Toledo

The present invention relates to a sensor cartridge (1) for inline measurement of a fluid (2), comprising: a body (10) having an interface section (11) configured to be connected to a sensor head, the interface section (11) comprising a measuring channel (12) for accommodating the fluid (2) to be measured, a pump (13) accommodated in the body (10), the pump (13) comprising an actuating member (130) being configured to be actuated by the sensor head when the interface section (11) is connected to the sensor head to pump the fluid (2) to be analyzed through the measuring channel (12), wherein the body (10) further comprises an in- and outflow section (14) connected to the interface section (11), wherein the in- and outflow section (14) comprises an inflow channel (15) and an outflow channel (16), the inflow channel (15) being in flow connection with the outflow channel (16) via the measuring channel (12) and the pump (13) so that the fluid (2) to be measured can be pumped from the inflow channel (15) via the measuring channel (12) to the outflow channel (16) to enable an inline measurement of the fluid (2).

A probe head (10) suitable for Raman spectroscopy comprises an optical pathway (110) along which it is intended that light is emitted for illuminating a sample and light returns from the sample. The probe head further comprises an internal reference target selector (25) which allows to selectively bring a reference target (253) into said optical pathway, in which case the returning light, and thus the measurement signal, originate form the reference target, and to selectively provide free passage for the light to and from the sample, in which case the returning light, and thus the measurement signal, originate form the sample. The reference target has a known Raman spectrum. Measurement values from the reference target thus enable calibration of the Raman spectroscopy measurements. The internal reference target selector enables calibration without removing the probe head from a measurement setup.

A device (100) for calibrating an X-ray system (200) with an X-ray source (210) and an X-ray detector (220), the calibration device (100) comprising a set of at least two X-ray absorptive elements (1, 2), each element (1, 2) extending in a longitudinal (LO) and in a lateral (LA) direction, is according to the invention characterized in that the device (100) is configured to enable adjustment of the position of each element (1, 2) along a closed curve (C₁, C₂) in a plane that extends transverse to the lateral direction (LA) and in parallel to the longitudinal direction (LO) so that elements (1, 2) in each of a first and a second subset (10, 20) of the set of elements (1, 2) are positioned with their longitudinal directions (LO) aligned in an alignment direction transverse to the curve (C₁, C₂), and wherein a first total length in the longitudinal direction (LO) of the elements (1, 2) of the first subset (10) is different from a second total length in the longitudinal direction (LO) of the elements (1, 2) of the second subset (20).

An objective lens unit (6) for a microscope is disclosed. The objective lens unit is suitable to be used when at least partially submerged in a liquid sample. The objective lens unit comprises an immersion lens (64, 642) positioned adjacent a distal front end (62) of the enclosure of the objective lens unit. The immersion lens is arranged and configured to receive light through a front end optical aperture (63). An objective lens system (65, 66) is arranged inside an enclosure (61) and proximal from the immersion lens (64, 642). The objective lens system is configured to collect light received by the immersion lens (64, 642) through the front end optical aperture (63). The objective lens system comprises a motorless automated adjustable lens (65), in particular a tuneable lens, configured to amend the focal length of the objective lens system relative to the immersion lens.

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The invention relates to the field of weighing, in particular of weighing in mass calibration and/or weighing laboratories. The invention provides a method for determining air density ρ_a as well as a related weighing system 1 and a related set comprising a mass artefact 11. A method for determining an air buoyancy correction to a measured weighing value, the method using the determined air density, as well as a related computer program and a related computer-readable signal or medium are provided as well.The method comprises a step S2 of providing a mass artefact as a first weight piece 11 and at least two of a first mass value m₁ representing the mass of the first weight piece, a first density value ρ₁ representing the density of the first weight piece, and a first volume value V₁ representing the volume of the first weight piece. The method comprises further a step S3 of providing a second weight piece 12 as well as a second density value ρ₂ representing the density of the second weight piece. The method comprises further a step S4 of determining a first weighing value (w₁, Δw) of the first weight piece 11 using the weighing system 1, wherein the first weighing value is determined in the air for which the air density is to be determined.